In this video I’ll show you how to model straight GT2-6 timing belt and how to model continuous belt around two pulleys in a plane.
The centre to centre distance
When modelling a belt around two pulleys we have a few constraints:
the pitch circumference of each pulley
the pitch of the timing belt
What we need is the ideal distance between the centre of the two pulleys so that the belt fits perfectly. The centre to centre distance is described as
C = center to center distance
D = diameter of pitch circle of gear 1
d = diameter of pitch circle of gear 2
b =
L = pitch of timing belt
For Fusion 360 you may find that it is easier to break the large equation into smaller sections like calculating ‘b’ first.
Final thoughts
Should I do a follow up with other kinds of belt? Other designs? Let me know.
This is part 2 of How I would create a robot arm from scratch. In part one I talked about high-level approach and used a computer model to work out some of the design constraints to meet my goals. In this part I applied my design skills to plan a model that should fit within those constraints. Pictures inside! (more…)
